Always had sleeping problems, could it possibly be because of witnessing emotional abuse?

I've always had troubles falling asleep, it takes between an hour- 4 hours before I fall asleep. Once I'm asleep I don't easily wake up. But not so long ago I sort of found out I've been witnessing emotional and psychological abuse since the moment I was born and have been undergoing it myself when I was a teenager. Could my sleep problems be related to the abuse I saw, I have wondered for a while now...
Always had sleeping problems, could it possibly be because of witnessing emotional abuse?
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